CAT1021WI-45-GT3

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active High/Active Low
Reset Timeout:	130 ms Minimum
Voltage - Threshold:	4.5V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	CAT1021

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Introduction

The CAT1021WI-45-GT3 is a low-power voltage supervisory integrated circuit (IC) designed for advanced RISC microcomputer applications. It supports up to six voltage supplies, combining independent undervoltage lockout (UVLO) and overvoltage protection (OVP) functions into a single chip. The CAT1021WI-45-GT3 is optimized to offer high-speed and low-power performance, as well as a high degree of flexibility.

Application

The CAT1021WI-45-GT3 can be used in a wide range of applications, from digital cameras to personal computers, and from home gaming systems to smart TVs. Its wide operating range,/ high minimum reset time, and low dropout enable it to be used for both direct and power supply monitoring, as well as for powering interactive game controllers, e-readers, and peripherals. It is suitable for both 5V and 3.3V logic supply systems, with an adjustable voltage monitor threshold of 1.08V to 2.90V. The adjustable OVP threshold offers effective protection against overvoltage and surges on power rails.

Main Features

The CAT1021WI-45-GT3 is a high-speed voltage supervisory IC that provides a variety of features that make it ideal for monitoring voltage levels in a wide range of applications such as digital cameras and personal computers. Some of its key features include: * High-speed reset time: The reset time is 0.4µs with an external capacitor* Automatic power-on reset (POR): POR is provided to ensure a reliable system start-up* UVLO and OVP Thresholds: Adjustable voltage monitor thresholds from 1.08V to 2.90V* Low dropout: The device has a very low dropout voltage of 1.1V* High voltage endurance: The device can withstand high voltage stresses of up to 24V* Low power consumption: Low power consumption helps to minimize system costs

Working Principle

The CAT1021WI-45-GT3 is a low-power voltage supervisory IC, providing up to six independent undervoltage lockout (UVLO) and overvoltage protection (OVP) functions. The IC uses an internal voltage reference to monitor voltage levels, and a built-in comparator to detect voltage level changes. When the input voltage drops below the undervoltage threshold or rises above the overvoltage threshold, the device will trigger a reset signal, which will drive the output terminal low and cut off power to the downstream system. The IC includes an automatic power-on reset (POR) circuit, which performs a power up reset when the power rail reaches the POR threshold voltage. This helps to ensure a reliable system start-up and reduces system costs. The UVLO and OVP thresholds are adjustable from 1.08V to 2.90V, making it suitable for both 5V and 3.3V logic supply systems. The CAT1021WI-45-GT3 is designed for low power consumption, with a quiescent current of just 1.1µA. This helps to minimize system costs and power consumption. The device also features a very low dropout voltage of 1.1V and can withstand high voltage stresses up to 24V.

Conclusion

The CAT1021WI-45-GT3 is a low-power voltage supervisory IC designed for advanced RISC microcomputer applications. It supports up to six voltage supplies, combining independent undervoltage lockout (UVLO) and overvoltage protection (OVP) functions into a single chip. The IC includes an automatic power-on reset (POR) circuit, a high-speed reset time, adjustable voltage monitor thresholds from 1.08V to 2.90V, a low dropout voltage of 1.1V and high voltage endurance up to 24V, making it suitable for both 5V and 3.3V logic supply systems. It provides an ideal solution for applications such as digital cameras and personal computers, interactive game controllers, e-readers, and peripherals.

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